In:
Genome, Canadian Science Publishing, Vol. 33, No. 6 ( 1990-12-01), p. 903-907
Abstract:
Synaptonemal complexes in the amphidiploid Lolium multiflorum (4χ) × Festuca drymeja (4χ) have been examined by the whole mount spreading technique in nuclei with between 49 and 100% pairing. At mid to late zygotene nonhomologous associations are formed, with multivalents involving more than half the total axial element length in some cases. However, they are corrected by pachytene. There is evidence of differences in the timing or rate of pairing between the two sets of chromosomes; the L. multiflorum chromosomes seem more advanced than the F. drymeja chromosomes in their pairing at mid and late zygotene, and it is possible that this asynchrony places a constraint on intergenomic chromosome pairing.Key words: Lolium-Festuca, amphidiploid, synaptonemal complexes, nonhomologous pairing, correction mechanism.
Type of Medium:
Online Resource
ISSN:
0831-2796
,
1480-3321
Language:
English
Publisher:
Canadian Science Publishing
Publication Date:
1990
detail.hit.zdb_id:
2020635-5
SSG:
12
